Finding the Fourth Proportional to 142,656.92, 196,866.42 and 78,994.71

Step by Step Solution

1. Step 1: Write the proportion equation
   142,656.92 : 196,866.42 = 78,994.71 : x
2. Step 2: Convert to fraction form
   142,656.92/196,866.42 = 78,994.71/x
3. Step 3: Cross multiply
   142,656.92x = 196,866.42 × 78,994.71
4. Step 4: Simplify right side
   142,656.92x = 15,551,405,756.64
5. Step 5: Solve for x
   x = 15,551,405,756.64/142,656.92
6. Step 6: Final answer
   x = 109,012.63